View Omega 3861 US. A closer look at omega's caliber 3861. He talked about a possible ss non le with 321 and one with 3861.
The driving force behind omega's apollo 11. Functions include small seconds, hours, minutes, chronograph. New omega speedmaster professional moonwatch powered by calibre 3861.
Lemania created a family of cam switching chronograph movements in the 1960s just as chronograph watches were becoming more popular in the mass market.
Omega calibre 3861 (page 1). Caliber 3861 is an updated version of caliber 861 / 1861. See the quote towards the end of the below article. A complete guide to the omega caliber 3861.